Synchronous call to flow designer API throwing exception 'The current execution is in the waiting state'

[kc1959]

Hello,

we are trying to perform some 'front end validation' (FEV) when a user submits a catalog item in the portal.

The intention is that, on submission of the catalog item:

1. We call the flow designer subflow as shown in the code below

2. The flow will perform a REST call to look up our Active Directory (AD) and ensure that the users selected on the form exist in AD

3. If we get a 'failure' response from the sn_fd.FlowAPI.getRunner().subflow call, we display a warning/error message to the user and abort the form submission

Unfortunately the REST call appears to wait for available threads and this results in a failure of 'The current execution is in the waiting state' in the exception 'catch' code as detailed below.

Has anyone encountered this previously and perhaps has a workaround? 

We can't execute this asynchronously as we need this validation check to occur within a few seconds if submission.

From the SN documentation:

Exception

The API throws an exception when a flow called synchronously pauses. The current execution is in the waiting state. In most cases, the exception is removed when the flow resumes. However, the API cannot resume a flow that has been sent to a MID Server.

The script include code that is called:

            var resultF = sn_fd.FlowAPI.getRunner().subflow('global.front_end_su_validation_control_flow').inForeground().withInputs(inputs).run();
            gs.log('the callValFlow returned - here 1', 'xxxxx');
            var outputs = resultF.getOutputs();
            gs.log('Jthe callValFlow returned outputs = ' + outputs, 'xxxxx');

            // Get Outputs:
            // Note: outputs can only be retrieved when executing synchronously.
            var result = outputs['result']; // String
            var respmess = outputs['respmess']; // String

            gs.log('IDAM FEV result is ' + result + ' respmess is ' + respmess, 'xxxxx');

            //CL: encode JSON
            var json = new JSON();
            var data = json.encode(outputs); //JSON formatted string   
            gs.log('IDAM FEV data is ' + data, 'xxxxx');
            return data;

        } catch (ex) {
            var message = ex.getMessage();
            gs.log('IDAM validation failed and entered CATCH statement - error message is = ' + message, 'xxxxx');
            gs.error(message);
        }

[tstocking]

Did you ever get a resolution to this? We are running into the same issue currently.

Thanks,

Todd